Breezy borked postfix (seriously!)

[Clint Tinsley]

As a rule of thumb because my ISP does not support IPv6, I disable it, everywhere!  You need to implement the following.

etc/modprobe.d/aliases

Should read:

alias net-pf-10 off
# alias net-pf-10 ipv6

It's nice that IPv6 is enabled in the kernel but it is not completely supported by ISP's and others so the only real fix is to disable until laggard ISP's and others are forced to support it for all users and sites.

----- Original Message -----
From: David <david at kenpro.com.au>
To: "Ubuntu Help and User Discussions" <ubuntu-users at lists.ubuntu.com>
Subject: Re: Breezy borked postfix (seriously!)
Date: Fri, 23 Dec 2005 09:28:59 +1100

> 
> On Thu, Dec 22, 2005 at 02:41:42PM +0100, ulrich steffens wrote:
> > Am Donnerstag, den 22.12.2005, 15:39 +1100 schrieb David:
> > > On Thu, Dec 22, 2005 at 03:11:19PM +1100, Peter Lieverdink wrote:
> > > > David wrote:
> > > > > Hoary/postfix worked great for local mail delivery. After 
> > upgrade to > > > Breezy, postfix seems to have got reconfigured 
> > (not removed) so that it > > > silently queues all email. > > > > 
> > > > /var/log/mail.err says:
> > > > > Dec 22 13:41:50 localhost postfix/master[15812]: fatal: > > 
> > > /etc/postfix/master.cf: line 84: bad hostname or network 
> > address: ::1:smtp
> > > > > > > > /etc/postfix/master.cf says:
> > > > > 127.0.0.1:smtp inet n   -       -       -       -       smtpd
> > > > > ::1:smtp       inet n   -       -       -       -       smtpd
> > > > > > > > /etc/postfix/main.cf says:
> > > > > mynetworks = 127.0.0.0/8
> > > > > myhostname = test.kenpro.com.au
> > > > > > > > david at test:~ $ cat /etc/hostname
> > > > > test
> > > > > david at test:~ $ cat /etc/resolv.conf
> > > > > search kenpro.com.au
> > > > > > > > I have no idea where the line > > > ::1:smtp       
> > inet n   -       -       -       -       smtpd
> > > > > in master.cf comes from, but by commenting it out and 
> > restarting postfix, > > > all my queued mail was instantly 
> > delivered, so that must be the culprit.
> > > > > > > > Can anyone suggest what I've done wrong?
> > > > > > You disabled ipv6 support :-)
> > > > > > ::1 is 'localhost' in ipv6 format. Do you have an entry like:
> > > > > > "::1     ip6-localhost ip6-loopback"
> > > > > > in /etc/hosts?
> > > > > > By not loading the ipv6 module, postfix can't listen on that address,
> > > > and thus fails. Commenting it out like you say you did is a 
> > safe solution.
> > > ___________________________________
> > > david at test:~ $ cat /etc/hosts
> > > <snip>
> > > # The following lines are desirable for IPv6 capable hosts
> > > # (added automatically by netbase upgrade)
> > > > ::1     ip6-localhost ip6-loopback
> > > fe00::0 ip6-localnet
> > > ff00::0 ip6-mcastprefix
> > > ff02::1 ip6-allnodes
> > > ff02::2 ip6-allrouters
> > > ff02::3 ip6-allhosts
> > > __________________________________
> > > > I'm curious how this would have come about. I'm happy to 
> > leave ipv6 > disabled but does this constitute a bug? given that 
> > all I did was > hoary->breezy upgrade.
> > > > What causes the ipv6 module to be loaded?
> > > > Thanks for your answer.
> > > > David.
> > > does '/etc/modprobe.d/aliases' contain a line like
> > 	alias net-pf-10 ipv6
> > or does it say
> > 	alias net-pf-10 off
> >
> 
> 
> alias net-pf-10 ipv6
> 
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